﻿//-----------------------------------------------------------------------
// <copyright file="Grid.cs" company="Nathan Miller">
// Copyright (c) Nathan Miller.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
//-----------------------------------------------------------------------
namespace TileTool.Base.Editor.Grid
{
    using System;
    using TileTool.Common.Math;
    using TileTool.Editor.Grid;

    /// <summary>
    /// Grid implementation.
    /// </summary>
    public class Grid : IGrid
    {
        #region Fields - Private

        /// <summary>
        /// Grid size.
        /// </summary>
        private int size;

        #endregion

        #region Properties - Public

        /// <summary>
        /// Gets or sets the size of the grid.
        /// </summary>
        public int Size
        {
            get
            {
                return this.size;
            }

            set
            {
                if (value <= 0)
                {
                    throw new ArgumentException("Grid size must be > 0");
                }

                this.size = value;
            }
        }

        #endregion

        #region Methods - Public

        /// <summary>
        /// Snap the passed point to the grid.
        /// </summary>
        /// <param name="vec">Vector to snap to the grid.</param>
        /// <returns>Returns the vector snapped to the grid.</returns>
        public Vector2D SnapVector(Vector2D vec)
        {
            return MathUtility.SnapVector(vec, this.Size);
        }

        #endregion
    }
}
